[660db8c8] | 1 | /** |
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| 2 | * @file rtems/asm.h |
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| 3 | * |
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| 4 | * This include file attempts to address the problems |
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| 5 | * caused by incompatible flavors of assemblers and |
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| 6 | * toolsets. It primarily addresses variations in the |
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| 7 | * use of leading underscores on symbols and the requirement |
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| 8 | * that register names be preceded by a %. |
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| 9 | */ |
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| 10 | |
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| 11 | /* |
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| 12 | * NOTE: The spacing in the use of these macros |
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| 13 | * is critical to them working as advertised. |
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| 14 | * |
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| 15 | * This file is based on similar code found in newlib available |
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| 16 | * from ftp.cygnus.com. The file which was used had no copyright |
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| 17 | * notice. This file is freely distributable as long as the source |
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| 18 | * of the file is noted. This file is: |
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| 19 | * |
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| 20 | * Copyright (c) 2015 University of York. |
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| 21 | * Hesham Almatary <hesham@alumni.york.ac.uk> |
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| 22 | * |
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| 23 | * |
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| 24 | * COPYRIGHT (c) 1994-1997. |
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| 25 | * On-Line Applications Research Corporation (OAR). |
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| 26 | * |
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| 27 | * Redistribution and use in source and binary forms, with or without |
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| 28 | * modification, are permitted provided that the following conditions |
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| 29 | * are met: |
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| 30 | * 1. Redistributions of source code must retain the above copyright |
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| 31 | * notice, this list of conditions and the following disclaimer. |
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| 32 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 33 | * notice, this list of conditions and the following disclaimer in the |
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| 34 | * documentation and/or other materials provided with the distribution. |
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| 35 | * |
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| 36 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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| 37 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 38 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 39 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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| 40 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 41 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 42 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 43 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 44 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 45 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 46 | * SUCH DAMAGE. |
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| 47 | */ |
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| 48 | |
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| 49 | #ifndef __RISCV_ASM_H |
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| 50 | #define __RISCV_ASM_H |
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| 51 | |
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| 52 | /* |
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| 53 | * Indicate we are in an assembly file and get the basic CPU definitions. |
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| 54 | */ |
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| 55 | |
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| 56 | #ifndef ASM |
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| 57 | #define ASM |
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| 58 | #endif |
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| 59 | #include <rtems/score/cpuopts.h> |
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| 60 | #include <rtems/score/riscv.h> |
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| 61 | |
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| 62 | /* |
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| 63 | * Recent versions of GNU cpp define variables which indicate the |
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| 64 | * need for underscores and percents. If not using GNU cpp or |
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| 65 | * the version does not support this, then you will obviously |
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| 66 | * have to define these as appropriate. |
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| 67 | */ |
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| 68 | |
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| 69 | #ifndef __USER_LABEL_PREFIX__ |
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| 70 | #define __USER_LABEL_PREFIX__ _ |
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| 71 | #endif |
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| 72 | |
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| 73 | #ifndef __REGISTER_PREFIX__ |
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| 74 | #define __REGISTER_PREFIX__ |
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| 75 | #endif |
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| 76 | |
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| 77 | /* ANSI concatenation macros. */ |
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| 78 | |
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| 79 | #define CONCAT1(a, b) CONCAT2(a, b) |
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| 80 | #define CONCAT2(a, b) a ## b |
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| 81 | |
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| 82 | /* Use the right prefix for global labels. */ |
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| 83 | |
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| 84 | #define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x) |
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| 85 | |
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| 86 | /* Use the right prefix for registers. */ |
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| 87 | |
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| 88 | #define REG(x) CONCAT1 (__REGISTER_PREFIX__, x) |
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| 89 | |
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| 90 | /* |
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| 91 | * define macros for all of the registers on this CPU |
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| 92 | * |
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| 93 | * EXAMPLE: #define d0 REG (d0) |
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| 94 | */ |
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| 95 | |
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| 96 | /* |
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| 97 | * Define macros to handle section beginning and ends. |
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| 98 | */ |
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| 99 | #define BEGIN_CODE_DCL .text |
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| 100 | #define END_CODE_DCL |
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| 101 | #define BEGIN_DATA_DCL .data |
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| 102 | #define END_DATA_DCL |
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| 103 | #define BEGIN_CODE .text |
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| 104 | #define END_CODE |
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| 105 | #define BEGIN_DATA |
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| 106 | #define END_DATA |
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| 107 | #define BEGIN_BSS |
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| 108 | #define END_BSS |
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| 109 | #define END |
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| 110 | |
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| 111 | /* |
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| 112 | * Following must be tailor for a particular flavor of the C compiler. |
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| 113 | * They may need to put underscores in front of the symbols. |
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| 114 | */ |
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| 115 | |
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| 116 | #define PUBLIC(sym) .global SYM (sym) |
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| 117 | #define EXTERN(sym) .extern SYM (sym) |
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| 118 | #define TYPE_FUNC(sym) .type SYM (sym), %function |
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| 119 | |
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| 120 | #endif |
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